12805000

素因数分解:

$2^3\times 5^4\times {\mathrm{13}}^1\times {\mathrm{197}}^1$

素因数の和:236

約数の個数: 80

約数和(自身を含む): 32473980

約数和(自身を除く): 19668980

約数列:

[1, 2, 4, 5, 8, 10, 13, 20, 25, 26, 40, 50, 52, 65, 100, 104, 125, 130, 197, 200, 250, 260, 325, 394, 500, 520, 625, 650, 788, 985, 1000, 1250, 1300, 1576, 1625, 1970, 2500, 2561, 2600, 3250, 3940, 4925, 5000, 5122, 6500, 7880, 8125, 9850, 10244, 12805, 13000, 16250, 19700, 20488, 24625, 25610, 32500, 39400, 49250, 51220, 64025, 65000, 98500, 102440, 123125, 128050, 197000, 246250, 256100, 320125, 492500, 512200, 640250, 985000, 1280500, 1600625, 2561000, 3201250, 6402500, 12805000]

約数ペア:

[(1, 12805000), (2, 6402500), (4, 3201250), (5, 2561000), (8, 1600625), (10, 1280500), (13, 985000), (20, 640250), (25, 512200), (26, 492500), (40, 320125), (50, 256100), (52, 246250), (65, 197000), (100, 128050), (104, 123125), (125, 102440), (130, 98500), (197, 65000), (200, 64025), (250, 51220), (260, 49250), (325, 39400), (394, 32500), (500, 25610), (520, 24625), (625, 20488), (650, 19700), (788, 16250), (985, 13000), (1000, 12805), (1250, 10244), (1300, 9850), (1576, 8125), (1625, 7880), (1970, 6500), (2500, 5122), (2561, 5000), (2600, 4925), (3250, 3940)]